Having problems with Anti-virus & REX 4.

When I try to download REX 4 updates I continually get a Trojan virus warning which is apparently a false positive. I run Norton 360. Has anyone had experience with ESET Internet Security as this is what I hope to change to instead of Norton. I need a strong Security system for my requirements but not one plagued with false positives. Please feel free to comment on your ESET NOD32 Internet Security experience, cheers. 
